The West Australian reports the Minister has vowed to pursue the matter through the quarantine consultation forum.
He asked: "How can we let in lots of workmen to within a few hundred metres of stables given that the disease is airborne, it can be carried on the clothing or on the person of a human."
Racing officials and trainers have expressed disbelief that WYD workers would be granted permission to enter a quarantined zone.
Peter V'Landys, chief executive of Racing NSW, has repeatedly urged the state government to find an alternative venue for WYD.
Minister McGauran also revealed Prime Minister John Howard had been preparing to weigh into the WYD controversy.
He said: "World Youth Day at Randwick is like trying to fit a square peg into a round hole and I was hoping that we would have time for the Prime Minister to consider the issue and to talk to Cardinal Pell."
"The AJC (Australian Jockey Club) gave me a briefing note ... the Prime Minister asked to see it and before we could act [NSW Premier] Morris Iemma's let contractors onto Randwick Racecourse."
Governments at odds over World Youth Day (The West Australian, 20/9/07)
LINKS (not necessarily endorsed by Church Resources)
World Youth Day 2008
Australian Jockey Club
WYD construction an equine flu risk: Randwick trainers (CathNews, 19/9/07)
WYD as big as the Olympics: Anglican Archbishop (CathNews, 19/9/07)
WYD gifts tax deductible (CathNews, 17/9/07)
Vic govt comes to WYD funding party (CathNews, 5/9/07)
WYD registrations exceeding expectations (CathNews, 4/9/07)
WYD stays at Randwick, Premier rules (CathNews, 31/8/07)
Greens join Randwick exit chorus (CathNews, 30/8/07)
Not moving: Randwick trainers defiant (CathNews, 30/8/07)
Not too late to move WYD: Cups King (CathNews, 27/8/07)
WYD seeks Sydney harbour site for opening (CathNews, 20/8/07)
Conversions off the WYD inter-faith agenda (CathNews, 16/8/07)
WYD to showcase faith potential to unite world (CathNews, 15/8/07)
Howard, Rudd promise $15 million more for WYD (CathNews, 13/8/07)
Condoms not on for WYD (CathNews, 30/7/07)
Love in the air for WYD (CathNews, 24/7/07)
Young Christians helping WYD pilgrims get piece of action (CathNews, 19/7/07)
Open hearts to WYD pilgrims, Fisher urges Sydney (CathNews, 17/7/07)
Can't lease Randwick for WYD, trainers tell club (CathNews, 11/7/07)
Randwick no place for pope, opines Cup winner Cummings (CathNews, 10/7/07)
Pope set to come, trainers to sue over WYD (CathNews, 5/7/07)